You can go with a wooden brace but depending on the load on your garage door header the sag could reoccur overtime.
Garage door header replacement.
The lintellift system is a patented product that ensures garage door lintels or headers won t sag.
Tbe row of 6 blocks have a 2 x 10 on top and a 2 x 10 below them.
To install the extra header jack your door up to correct the sag and bolt in the beam.
These will help to support the new garage door header.
Sagging garage door header lift system.
It is a good idea to sandwich 1 2 plywood or osb between the pieces of 2x dimension lumber.
Over the years the garage door header has sagged du.
You basically build kind of a fake wall right up to the underside of those rafters to support them between the garage floor and the underside of the rafters while you do the disassembly and replacement of the header.
Take some 2x4 s and use these to add 3 rows of supporting frames around the sides of the door and just below the header.
If any portion of your garage door header has rotted or softened due to water exposure you need in replace the entire header.
You can t replace a 16 chunk of it and retain any structural integrity.
This header should be an inch and a half higher than the garage door and 9 inches wider than the door.
The procedure for constructing a header for 6 inch exterior wall framing can be modified for any wall thickness.
The lintellift system fixes this issue by adding support underneath the sagging lintel.
These 9 foot openings are only supported by a makeshift header consisting of 6 cinder blocks sitting horizontally across the top of the opening.
When a garage door lintel fails it causes the brick wall being supported to sag leaving a noticeable crack right above the garage door.
And you do that right inside the garage door.
Step 2 replace the header.
We have an old cinder block garage shed building built in 1967 with 2 9 foot wide garage door openings.